But don’t let those stats deter you. According to sex and relationships expert Annabelle Knight, who is also an ambassador for adult toys business Lovehoney, it’s completely possible for men and women to finish every time they have sex.

So, what’s the problem?

Why couples aren’t achieving orgasm

Routine

There is one prevailing reason which stops both men and women climaxing when they have sex, according to Knight – and that is old, humdrum routine.

“Routine is the biggest barrier I find in couples both orgasming,” she says.

“I meet so many couples who say: 'We used to have great sex when we first meet but no longer.”

“I then go into the reasons why the fireworks are no longer sparking and they admit that their sexual routine has not changed for years - same time, same place, same position.

She adds: “If you have the same meal every night, you soon get bored of it. Why do you think sex is any different?”

As for overcoming this issue, Knight advises it is all about “trying new things”.

“Couples need to mix things up, break that routine, try new things and work as hard on their sex lives as they do on other aspects of their relationship.

Here are her practical tips on how to mix it up:

Live out your fantasies - “Each write your 10 favourite sex fantasies on post-it notes and put them in a jar. Take it in turns to pick one out every week and live it out for real.”

Set your alarm 30 minutes early for morning sex - “It’s probably the last thing you are thinking about when you wake up bleary-eyed dreading another day at work. But engaging in a bit of loving action first thing in the morning will leave you both with with lasting benefits throughout the day.”

Be strangers - “Book a room at a local hotel. Then call your partner and tell them to pack a bag and meet you at the hotel bar. Give each other fake names and pretend you're meeting for the first time, before you head up to the room.”

Try new positions - “Make sure you try at least one new sexual position every week or few weeks. This will get you both thinking about experimenting sexually and hopefully looking at new locations to enjoy sex outside the bedroom.”

However, being stuck into rut isn’t the sole reason why people can struggle with orgasm. Here are the other most common factors:

Clitoral stimulation

Less than one in three (30%) of women can climax without added clitoral stimulation, according to LoveHoney research – making the absence of this the number one reason why women don’t come during sex.